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HII Regions of NGC 628 and M101 as seen with SpIOMM

Published online by Cambridge University Press:  05 December 2011

Laurie Rousseau-Nepton ,
Carmelle Robert  and
Laurent Drissen
Laurie Rousseau-Nepton
Affiliation:
Université Laval & CRAQ, Québec, QC, G1V 0A6, Canada email: [email protected]
Carmelle Robert
Affiliation:
Université Laval & CRAQ, Québec, QC, G1V 0A6, Canada email: [email protected]
Laurent Drissen
Affiliation:
Université Laval & CRAQ, Québec, QC, G1V 0A6, Canada email: [email protected]
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Abstract

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With SpIOMM, we obtained numerous spectra in the visible range covering simultaneously several emission lines of bright Hii regions in the spiral galaxies NGC 628 and M101. We measured the size and luminosity of the Hii regions as well as the gas metallicity, temperature, and density. We estimated the age and star forming rate of the young stellar populations associated with the Hii regions. We looked for gradients along the galaxy radius and search for relations with the galactic arm positions. This is a first step in a project, based on a detailed study of stellar populations, to rebuild the history of spiral galaxies and to identify the mechanisms responsible for their evolution.

Keywords

Galaxies: spiralgalaxy: abundancesstars: formationgalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S277: Tracing the Ancestry of Galaxies (on the land of our ancestors) , December 2010 , pp. 112 - 115
Copyright
Copyright © International Astronomical Union 2011

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